PL76786B2 - - Google Patents

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Publication number
PL76786B2
PL76786B2 PL16396773A PL16396773A PL76786B2 PL 76786 B2 PL76786 B2 PL 76786B2 PL 16396773 A PL16396773 A PL 16396773A PL 16396773 A PL16396773 A PL 16396773A PL 76786 B2 PL76786 B2 PL 76786B2
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PL
Poland
Prior art keywords
zirconium
shapes
products
zirconium silicate
contact
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Application number
PL16396773A
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Polish (pl)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to PL16396773A priority Critical patent/PL76786B2/pl
Publication of PL76786B2 publication Critical patent/PL76786B2/pl

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Description

Pierwszenstwo: Zgloszenie ogloszono: 01.08.1974 Opis patentowy opublikowano: 15.04.1975 76786 KI. 80b, 8/137 MKP C04b 3B/48 CZYTELNIA Urzedu Patentowego fibfciil tutiim ?i l Twórcy wynalazku: Irena Olbrychtowicz, Waclaw Szymborski, Jan Jamroz, Stanislaw Malec, Justyn Stachurski Uprawniony z patentu tymczasowego: Instytut Materialów Ogniotrwalych,.Gliwice (Polska) Sposób wytwarzania wyrobów cyrkonowych do pracy w kontakcie z plynna stala Wynalazek dotyczy wytwarzania wyrobów cyrkonowych rekrystalizowanych z naturalnego krzemianu cyrkonu, nadajacych sie do zastosowania w hutnictwie.Stosowana dotychczas technologia wytwarzania wyrobów cyrkonowych z krzemianu cyrkonu do pracy w kontakcie z plynna stala ogranicza sie do wylewów.biceramicznyeh cyrkonowo-szamotowych, gdzie tworzywo cyrkonowe z dodatkiem gliny wystepuje w postaci wkladki wylewu.Znane sa ponadto wylewy z krzemianu cyrkonu niekrystalizowanego oraz wylewy z palonek cyrkonowych.Oba gatunki posiadaja strukture jednofazowa, skladajaca sie ze spieczonych ziam krzemianu cyrkonu o jednako¬ wej zawartosci tlenku cyrkonu w calej masie. Warstwa powierzchniowa, pracujaca w kontakcie ze stala, nie jest wzbogacana w tlenek cyrkonu. Wyroby te z uwagi na niska odpornosc na korozje chemiczna ulegaja szybkiej erozji w kontakcie z plynna stala.Sposób wytwarzania wyrobów cyrkonowych do pracy w kontakcie z plynna stala, z krzemianu cyrkonu, zarobionego lepiszczem i plastyfikatorem organicznym, nawilzonego i wyformowanego w ksztaltki wedlug wyna¬ lazku polega na tym, ze ksztaltki formuje sie z naturalnego koncentratu cyrkonu o uziarnieniu ponizej 400 /im, a korzystnie 15% frakcji ponizej 5 /im i wypala w temperaturze 1700—1780°C.Wyroby cyrkonowe rekrystalizowane, wytworzone sposobem wedlug wynalazku, maja powierzchnie kon¬ taktowa wzbogacona w tlenek cyrkonu, co umozliwia stosowanie ich w kontakcie z plynna stala, szczególnie jako ksztaltki, sluzace do odlewania stali. Moga to byc wylewy dozujace (dozatory), wylewy suwakowe, wylewy tradycyjne dla odlewania bardzo agresywnych gatunków stali.Sposób wedlug wynalazku wyjasnia blizej przyklad.Przyklad. Naturalny krzemian cyrkonu miele sie do uziarnienia ponizej 400 /im, przy czym korzystnie jest, gdy sklad ziarnowy surowcajest nastepujacy: 15% frakcji ponizej 5 /im 40% frakcji ponizej 20 /im 80% frakcji ponizej 200 /im 100% frakcji ponizej 400 /im2 76 786 Mieszanine te miesza sie z lepiszczem i plastyfikatorem organicznym w roztworze wodnym, równomiernie nawilzajac mase do zawartosci wody 2-6%. Z uzyskanej masy formuje sie na prasach mechanicznych, wibracyj¬ nie lub pneumatycznie, ksztaltki pod cisnieniem 200—1000 kG/cm2, w zaleznosci od ich formatu i przeznacze¬ nia. Wyformowane pólfabrykaty suszy sie i wypala w piecach wysokotemperaturowych w temperaturze 1700-1780°C.Wyroby wytworzone sposobem wedlug wynalazku umozliwiaja prowadzenie odlewania stali wysokostopo- wych metoda ciagla lub stosowanie wylewu suwakowego, umozliwiajacego bezawaryjne prowadzenie specjalnych procesów stalowniczych, jak cisnieniowe odlewanie, swiefzenie tlenem i prózniowe odlewanie stali. PL PLPriority: Application announced: August 1, 1974 Patent description was published: April 15, 1975 76786 KI. 80b, 8/137 MKP C04b 3B / 48 READING ROOM of the Patent Office fibfciil tutiim? Il Inventors: Irena Olbrychtowicz, Waclaw Szymborski, Jan Jamroz, Stanislaw Malec, Justyn Stachurski Authorized by a provisional patent: Institute of Fireproof Materials, Gliwice (Poland) The invention concerns the production of zirconium products recrystallized from natural zirconium silicate, suitable for use in metallurgy. The technology used to produce zirconium products from zirconium silicate for operation in contact with a liquid steel is limited to infusions. - chamotte, where the zirconium material with the addition of clay is in the form of a spout. Moreover, spouts made of non-crystallized zirconium silicate and outlets of zircon sticks are known. Both species have a single-phase structure, consisting of sintered zircon silicate in the same a whole lot e. The surface layer, in contact with the solid, is not enriched with zirconium oxide. These products, due to their low resistance to chemical corrosion, are subject to rapid erosion in contact with liquid solid. A method of producing zirconium products for work in contact with liquid steel, made of zirconium silicate, made with a binder and organic plasticizer, moistened and shaped into shapes according to the invention. consists in the fact that the shapes are formed from natural zircon concentrate with a particle size below 400 µm, preferably 15% of the fraction below 5 µm, and fired at a temperature of 1700-1780 ° C. Recrystallized zirconium products produced according to the invention have a surface area of ¬ tactile enriched with zirconium oxide, which allows their use in contact with liquid steel, especially as shapes for steel casting. These can be dosing nozzles (dispensers), sliding nozzles, traditional nozzles for casting very aggressive steel grades. The method according to the invention is explained in more detail by an example. The natural zirconium silicate is ground to a grain size of less than 400 µm, and preferably the grain composition of the raw material is as follows: 15% of the fraction below 5 / m and 40% of the fraction below 20 / m and 80% of the fraction below 200 / m 100% of the fraction below 400 / im2 76 786 This mixture is mixed with a binder and organic plasticizer in an aqueous solution, evenly wetting the mass to a water content of 2-6%. From the obtained mass, shapes are formed on mechanical presses, vibrating or pneumatically, under a pressure of 200-1000 kg / cm 2, depending on their format and purpose. The formed semi-finished products are dried and fired in high-temperature furnaces at a temperature of 1700-1780 ° C. The products manufactured by the method according to the invention allow for the continuous casting of high-alloy steels or the use of a slide gate, which enables failure-free execution of special steel-making processes, such as pressure casting, oxygen and cooling vacuum steel casting. PL PL

Claims (1)

1. Zastrzezenie patentowe Sposób wytwarzania wyrobów cyrkonowych do pracy w kontakcie z plynna stala, z krzemianu cyrkonu, zarobionego lepiszczem i plastyfikatorem organicznym, nawilzonego i wyformowanego w ksztaltki, znamienny tym, ze ksztaltki formuje sie z naturalnego koncentratu krzemianu cyrkonu o uziarnieniu ponizej 400 /im, a ko¬ rzystnie 15% frakcji ponizej 5 /um i wypala w temperturze 1700-1780°C, Prac. Poligraf. UP PRL. zam. 1929/75 naklad 120+18 Cena 10 zl PL PL1. Patent claim A method of producing zirconium products for work in contact with a liquid zirconium silicate solid, made with a binder and an organic plasticizer, moistened and formed into shapes, characterized in that the shapes are formed from a natural zirconium silicate concentrate with a grain size of less than 400 µm and preferably 15% of the fraction below 5 µm and fired at 1700-1780 ° C. Work. Typographer. UP PRL. residing 1929/75 circulation 120 + 18 Price PLN 10 PL PL
PL16396773A 1973-07-10 1973-07-10 PL76786B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16396773A PL76786B2 (en) 1973-07-10 1973-07-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL16396773A PL76786B2 (en) 1973-07-10 1973-07-10

Publications (1)

Publication Number Publication Date
PL76786B2 true PL76786B2 (en) 1975-02-28

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Application Number Title Priority Date Filing Date
PL16396773A PL76786B2 (en) 1973-07-10 1973-07-10

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PL (1) PL76786B2 (en)

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